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Clock Synchronization for Wireless Positioning of COTS Mobile Nodes

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3 Author(s)
Patrick Loschmidt ; Research Unit for Integrated Sensor Systems, Austrian Academy of Sciences, Viktor Kaplan Strasse 2, A-2700 Wiener Neustadt, Austria. ; Georg Gaderer ; Thilo Sauter

The paper presents an innovative method to detect the position of commercial-off-the-shelf (COTS) wireless 802.1 la/b/g client hardware by evaluating differential signal propagation delays, thereby enhancing security or safety in wireless networks. The measurement is done by detecting the arrival time of a client signal at precisely synchronized access points. The overall vision is to accurately determine the position of a sender as a basis for new techniques for access control and system security as well as location based services in wireless environments. Safety-critical applications, like the task to make machines accepting commands only from operators located within the range of the machine, can be implemented. Furthermore, a security architecture can use such location information in order to offer services such as position based access policies, VLANs (Virtual Local Area Network), or Internet connections defining precise spatial coverage.

Published in:

2007 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication

Date of Conference:

1-3 Oct. 2007